When the Celtics open their season in Miami Tuesday, if the sight of Ray Allen wearing a Heat uniform doesn’t turn the stomachs of Celtics fans, watching the Heat handing out their championship rings probably will.

Even TNT analyst Steve Kerr isn’t looking forward to it.

“I’m hoping Miami’s ring ceremony isn’t quite as obnoxious as the one six years ago,” Kerr told the T&G. “I was there for that one. It was like a lounge act. It was so embarrassing. Hopefully, they’ll tone it down a little bit.”

A lounge act in South Beach, who would have thought it possible?

“It was so bad,” Kerr said. “You should look it up online. It was an absolute embarrassment the way they introduced each player. It was a little bit like that press conference they had when LeBron (James) and (Chris) Bosh came. It was just totally over the top. Very little dignity involved, or humility. To me it was a total embarrassment.”

Kerr and Marv Albert will call the action on TNT Tuesday in Miami, where the Celtics’ 2011-2012 season ended in Game 7 of the Eastern Conference Finals.

Kerr called Miami the team everybody “loved to hate” deservedly or not, but he, like everyone else, picks the Heat to repeat as NBA champions. In fact, Kerr gives only one team any chance of dethroning the King. That team is the Celtics.

“I think they’re the only team that can beat the Heat in a seven-game series,” Kerr said, “and I give them an outside shot to do so. I think that’s a remarkable thing that they’re in that position at all, given that Ray left.”

Allen left the Celtics to sign with the Heat, but Kerr was impressed with the players whom Danny Ainge signed this summer.

“I thought Boston, outside of the Lakers,” Kerr said, “they had the best offseason of anybody this summer. I thought Danny did an amazing job of retooling, replacing Ray with Jason Terry and Courtney Lee, and then the gift of (Jared) Sullinger falling to them in the draft was huge.”

Kerr believes the return of Jeff Green from heart surgery and the signing of Leandro Barbosa will also help.

“They should have a much better bench,” Kerr said. “They should be a better scoring team. That was a problem for them a year ago. As long as (Rajon) Rondo is running the show and KG (Kevin Garnett) is anchoring the defense, they’re going to be in good shape.”

Doc Rivers somehow coached the Celtics to a 3-2 lead in the conference finals before James willed the Heat to the NBA Finals.

“I think if you had a poll to name one coach you could play for,” Kerr said, “Doc would probably win. Doc and Pop (San Antonio’s Gregg Popovich) would be 1-2, for sure.”

Kerr knows Barbosa well, having served as general manager of the Suns during Barbosa’s final two years with the team, and he thinks he can help the Celtics.

“He can really run and score in transition,” Kerr said. “He’s incredibly fast. He’s got these long arms. He’ll shoot these kind of weird, leaning shots in transition or when he penetrates. It looks awkward, but it’s really effective. He’s got an unorthodox looking jump shot that is kind of a two-handed push shot, but he’s been pretty consistent with it in his career. If he finds a niche and a good rhythm offensively, and I would think he would on this team because Boston executes pretty well in the halfcourt, I think he can give them the scoring off the bench that they haven’t had the last couple years.”

The Celtics lack a true point guard to back up Rondo, and Kerr warns Celtics fans not to expect Barbosa to fill that role.

“I don’t think he’s a point guard at all,” Kerr said. “He’s not a good decision-maker, he’s not a good passer. He’s someone you want at the two. He can bring the ball up the floor against pressure without any problem, but in terms of running the offense and being a point guard that’s not him.”

Kerr expects Allen to make a huge impact with the Heat.

“When they have consistent 3-point shooting,” Kerr said, “they’re almost impossible to guard and Ray Allen is going to be by far their most consistent 3-point shooter. They’ll have better spacing offensively and more room for LeBron and (Dwyane) Wade to work, which is a scary thought.”

Allen owns the NBA record for most 3-pointers and Kerr set the record for highest career 3-point shooting percentage (45.4), but Kerr retired at Allen’s age of 37. During his last couple of years, Kerr couldn’t recover as quickly from aches and pains.

“I had more spells for a week or two,” he said, “where my body was aching and I couldn’t get up and down the court quite as easily and that affects the shot.”

With the way Allen keeps himself in such great shape, Kerr sees no reason why he can’t be effective for another three years or so.